JP2003295358A - Opening and closing apparatus for original press-contact plate - Google Patents
Opening and closing apparatus for original press-contact plateInfo
- Publication number
- JP2003295358A JP2003295358A JP2002100925A JP2002100925A JP2003295358A JP 2003295358 A JP2003295358 A JP 2003295358A JP 2002100925 A JP2002100925 A JP 2002100925A JP 2002100925 A JP2002100925 A JP 2002100925A JP 2003295358 A JP2003295358 A JP 2003295358A
- Authority
- JP
- Japan
- Prior art keywords
- arm
- lift
- support arm
- original
- side plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Holders For Sensitive Materials And Originals (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Facsimiles In General (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複写機、印刷機、
スキャナー等に設置されて厚物原稿を圧着するのに用い
られるリフト機能付きの原稿圧着板開閉装置の改良に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, a printing machine,
The present invention relates to an improvement of a document pressure plate opening / closing device with a lift function which is installed in a scanner or the like and used for pressure bonding a thick document.
【０００２】[0002]
【従来の技術】この種の原稿圧着板開閉装置は、たとえ
ば、実用新案登録第２５９８５０６号（実開平６−８２
６４９）公報に開示されている。この原稿圧着板開閉装
置は、図６、図７に示すように、複写機等の装置本体４
０に取り付けられる取付部材４１と、この取付部材４１
に一端部側の両側板４３ａ，４３ａをヒンジピン４２を
介して回動自在に枢支連結された支持アーム４３と、こ
の支持アーム４３の上側に重なり合い該支持アーム４３
の他端部側の両側板４３ａ，４３ａに支持軸４４を介し
て回動自在に枢支連結され、原稿圧着板４５の後端側に
取り付けられるリフトアーム４６と、このリフトアーム
４６の支持アーム４３に対する枢支連結側であってリフ
トアーム４６の回動時に支持軸４４回りに旋回する位置
の両側板４６ａ，４６ａ間に架設された作動軸４７と、
この作動軸４７と取付部材４１側の支持アーム４３の枢
支連結位置とは異なる位置との間に支持アーム４３を原
稿圧着板４５の開き方向へ付勢させ、かつ原稿圧着板４
５を取り付けたリフトアーム４６を支持アーム４３と重
なり合う方向へ付勢保持するように弾設した圧縮コイル
ばね４８などで構成している。2. Description of the Related Art A document pressure plate opening / closing device of this type is disclosed, for example, in Utility Model Registration No. 2598506 (Actual Kaihei 6-82).
649). As shown in FIGS. 6 and 7, this document pressure plate opening / closing device has a device body 4 such as a copying machine.
Mounting member 41 mounted on 0, and this mounting member 41
A support arm 43 rotatably and pivotally connected to both side plates 43a, 43a on one end side via a hinge pin 42, and the support arm 43 overlaps with the support arm 43 on the upper side thereof.
A lift arm 46 rotatably pivotally connected to both side plates 43a, 43a on the other end side of the document via a support shaft 44 and attached to the rear end side of the original pressure plate 45, and a support arm for the lift arm 46. An actuating shaft 47 laid between both side plates 46a, 46a at a position pivoting around the support shaft 44 when the lift arm 46 is pivotally connected to 43.
The support arm 43 is urged in the opening direction of the original document pressure plate 45 between the operation shaft 47 and a position different from the pivotally connected position of the support arm 43 on the attachment member 41 side, and
The lift arm 46 to which 5 is attached is constituted by a compression coil spring 48 or the like that is elastically installed so as to urge and hold the lift arm 46 in the direction in which it overlaps with the support arm 43.
【０００３】上記構成の原稿圧着板開閉装置では、支持
アーム４３の両側板４３ａ，４３ａに、リフトアーム４
６が支持軸４４回りに回動する時に作動軸４７の旋回を
許容する切欠４９を設けてある。In the document pressure plate opening / closing device having the above structure, the lift arm 4 is attached to both side plates 43a, 43a of the support arm 43.
A notch 49 is provided to allow the working shaft 47 to pivot when the 6 rotates about the support shaft 44.
【０００４】[0004]
【発明が解決しようとする課題】しかるに、支持アーム
４３の両側板４３ａ，４３ａに切欠４９を設ける上記原
稿圧着板開閉装置では、支持アーム４３の両側板４３
ａ，４３ａに切欠き加工を要するため加工工数の増大を
招き、切欠４９は支持アーム４３の強度を低下させる原
因にもなる。作動軸４７はリフトアーム４６の両側板４
６ａ，４６ａの所定位置に軸穴をあけ、これに通して抜
け止め状に架設するという煩わしい組み付け作業を要す
る。However, in the document pressure plate opening / closing device in which the notches 49 are provided in the both side plates 43a, 43a of the support arm 43, the both side plates 43 of the support arm 43 are provided.
Since the notch machining is required for a and 43a, the number of machining steps is increased, and the notch 49 also causes the strength of the support arm 43 to be reduced. The operating shaft 47 is the both side plates 4 of the lift arm 46.
A troublesome assembly work is required in which a shaft hole is formed at a predetermined position of 6a and 46a, and the shaft hole is passed through the shaft hole to prevent the shaft from coming off.
【０００５】また、リフトアーム４６が厚物原稿の厚み
見合った高さにまで反転するようにリフトアーム４６の
高さを更に高く設計変更するには、ヒンジピン４２の軸
心と支持軸４４の軸心との間の軸間距離を長くする必要
があるが、これでは本装置が大型になる難点がある。そ
こで、小型化の目的のために前記軸間距離を短くして前
記切欠４９の切込み深さを更に深くすることになるが、
これでは支持アーム４３の強度不足を招くという問題が
生じる。Further, in order to further change the design of the height of the lift arm 46 so that the lift arm 46 can be inverted to a height corresponding to the thickness of a thick original, the axis of the hinge pin 42 and the axis of the support shaft 44 can be changed. It is necessary to increase the axial distance from the heart, but this has the drawback that the device becomes large. Therefore, for the purpose of downsizing, the distance between the shafts is shortened to further deepen the cut depth of the notch 49.
This causes a problem that the strength of the support arm 43 is insufficient.
【０００６】本発明の目的は、このような問題を解消す
るためになされたものであり、リフトアームに設けるリ
フトカムの構造に工夫を凝らすことにより支持アームの
加工の容易化及び強度確保を図れ、またリフトアームの
加工、組立ての容易化をも図れる原稿圧着板の開閉装置
を提供することにある。An object of the present invention is to solve such a problem, and by facilitating the structure of the lift cam provided on the lift arm, the support arm can be easily machined and its strength can be ensured. It is another object of the present invention to provide an opening / closing device for a document pressure plate that can facilitate the processing and assembly of the lift arm.
【０００７】[0007]
【課題を解決するための手段】本発明は、装置本体
（１）側に取り付けられる取付部材（５）と、この取付
部材に、その両側板（７ｂ）、（７ｂ）の後端部がヒン
ジピン（６）を介して上下方向に回動自在に枢支連結さ
れた支持アーム（７）と、この支持アームの上側に重な
り合い該支持アームの前端部に、その両側板（１１
ｂ）、（１１ｂ）の前端部が支持軸（９）を介して上下
方向に回動自在に枢支連結されて、原稿圧着板（２）の
後端側に取り付けられるリフトアーム（１１）と、支持
アーム（７）と取付部材（５）との間に、支持アーム
（７）を開き方向へ回動付勢し、かつリフトアーム（１
１）を支持アーム（７）と重なり合う方向へ付勢するよ
うに装着された圧縮コイルばね（１６）と、支持アーム
（７）に、圧縮コイルばね（１６）の前端部を受けて前
後方向に摺動自在に組み込まれたばね受（１４）と、を
備えている原稿圧着板の開閉装置において、リフトアー
ム（１１）の前端側の両側板（１１ｂ）、（１１ｂ）間
にリフトカム（２０）が設けられる。このリフトカム
が、リフトアーム（１１）の支持軸（９）回りの反転時
に支持軸（９）の下方から支持アーム（７）の前端側の
両側板（７ｂ），（７ｂ）間の内部に進入してばね受
（１４）を押圧する突部（２０ａ）を有する形に形成さ
れていることに特徴を有するものである。SUMMARY OF THE INVENTION According to the present invention, a mounting member (5) mounted on the apparatus body (1) side and a rear end portion of both side plates (7b) and (7b) of the mounting member are hinge pins. A support arm (7) pivotally connected in a vertically rotatable manner through (6) and an upper side of the support arm, which overlaps with the upper side of the support arm, and both side plates (11
b) and (11b) have front ends pivotally connected to each other via a support shaft (9) so as to be rotatable in the vertical direction, and a lift arm (11) attached to the rear end side of the original pressure plate (2). Between the support arm (7) and the mounting member (5), the support arm (7) is rotationally biased in the opening direction and the lift arm (1
1) A compression coil spring (16) mounted so as to bias the support arm (7) in a direction in which it overlaps with the support arm (7), and the support arm (7) receives the front end of the compression coil spring (16) in the front-back direction. In a document pressure plate opening / closing device including a slidably mounted spring receiver (14), a lift cam (20) is provided between both side plates (11b), (11b) on the front end side of a lift arm (11). It is provided. When the lift arm (11) is turned around the support shaft (9), the lift cam enters from below the support shaft (9) into the space between the side plates (7b) and (7b) on the front end side of the support arm (7). It is characterized in that it is formed in a shape having a protrusion (20a) for pressing the spring receiver (14).
【０００８】この場合において、前記リフトカム（２
０）はリフトアーム（１１）と別体に構成して該リフト
アーム（１１）の前端側の両側板（１１ｂ）、（１１
ｂ）間に取り付けることができる。In this case, the lift cam (2
0) is configured separately from the lift arm (11) and is formed on both side plates (11b), (11) on the front end side of the lift arm (11).
b) Can be installed between.
【０００９】[0009]
【作用】原稿が本のように厚物原稿の場合、原稿圧着板
（２）を閉じてその一部を厚物原稿に当てがい、原稿圧
着板の前端側を若干強く下方へ押すと、リフトアーム
（１１）が、リフトカム（２０）の突部（２０ａ）でば
ね受（１４）を介して圧縮コイルばね（１６）を押圧
し、その弾力に抗して支持軸（９）まわりに反転し、原
稿圧着板（２）がその後端側をリフトアップされて厚物
原稿の上部に対して平行となり、厚物原稿全体を装置本
体上に均等な圧力で圧着させる。When the original is a thick original such as a book, the original pressure plate (2) is closed, a part of the original is applied to the thick original, and the front end side of the original press plate is pushed slightly strongly downward to lift. The arm (11) presses the compression coil spring (16) via the spring bearing (14) by the protrusion (20a) of the lift cam (20) and reverses around the support shaft (9) against its elasticity. The original pressing plate (2) is lifted up at its rear end side to be parallel to the upper portion of the thick original, and the entire thick original is pressed against the main body of the apparatus with uniform pressure.
【００１０】ばね受（１４）を押圧するリフトカム（２
０）の突部（２０ａ）は、リフトアーム（１１）の反転
時に、支持軸（９）の下方から支持アーム（７）の前端
側の両側板間の内部に進入して行くようにしてあるの
で、図６、図７に示す従来のように作動軸４７をリフト
アーム４６の両側板４６ａ，４６ａ間にわたって架設す
るという面倒な組み付け手間を要したり、支持アーム４
３の両側板４３ａ、４３ａに作動軸４７との干渉を避け
るべく切欠４９を加工したりするような必要が無くな
り、それだけリフトカム（２０）をリフトアーム（１
１）の前端部に簡単に設けることができ、また支持アー
ム（７）の強度を確保することも可能になる。A lift cam (2) for pressing the spring bearing (14)
When the lift arm (11) is turned over, the projection (20a) of (0) enters into the space between both side plates on the front end side of the support arm (7) from below the support shaft (9). Therefore, as in the prior art shown in FIG. 6 and FIG. 7, the laborious assembling work of constructing the operating shaft 47 across both side plates 46a of the lift arm 46 and the supporting arm 4 is required.
It is no longer necessary to form a notch 49 on both side plates 43a, 43a of No. 3 in order to avoid interference with the operating shaft 47.
It can be easily provided at the front end of 1) and the strength of the support arm (7) can be secured.
【００１１】リフトカム（２０）はリフトアーム（１
１）と別体に構成してあると、突部（２０ａ）の突出高
さや位置が異なる数種のリフトカム（２０）を用意し、
そのいずれかを選択して共用のリフトアーム（１１）に
取り付けるだけで、リフトアーム（１１）の高さが厚物
原稿の厚さに対応すべく任意高さに設定された各種の原
稿圧着板開閉装置を容易に得ることができる。The lift cam (20) is a lift arm (1
If it is configured separately from 1), several kinds of lift cams (20) having different protrusion heights and positions of the protrusions (20a) are prepared,
By simply selecting one of them and attaching it to a common lift arm (11), the height of the lift arm (11) is set to an arbitrary height so as to correspond to the thickness of a thick original document. The switchgear can be easily obtained.
【００１２】[0012]
【発明の実施の形態】以下、本発明の好適な実施形態を
図面に基づいて説明する。図１は本発明の一実施例の原
稿圧着板開閉装置を全閉状態で示す縦断側面図、図２は
図１におけるＡ‐Ａ断面図、図３は図１におけるＢ―Ｂ
線断面図、図４は図１の原稿圧着板開閉装置を全開状態
で示す縦断側面図、図５は図１の原稿圧着板開閉装置を
厚物原稿圧着状態で示す縦断側面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional side view showing a document pressure plate opening / closing device according to an embodiment of the present invention in a fully closed state, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is line BB in FIG.
FIG. 4 is a vertical sectional side view showing the original document crimping plate opening / closing device of FIG. 1 in a fully opened state, and FIG. 5 is a vertical sectional side view showing the original document crimping plate opening / closing device of FIG. 1 in a thick original document crimping state.
【００１３】図１において、１は複写機等の装置本体、
２は原稿圧着板、３は原稿圧着板２を装置本体１に対し
上下方向に開閉回動自在に取り付けた原稿圧着板開閉装
置である。In FIG. 1, reference numeral 1 is an apparatus main body such as a copying machine,
Reference numeral 2 is a document pressure plate, and 3 is a document pressure plate opening / closing device in which the document pressure plate 2 is attached to the apparatus main body 1 so as to be vertically openable / closable.
【００１４】原稿圧着板開閉装置３は、装置本体１にビ
ス等で取り付けられる取付部材５と、この取付部材５
に、その後端側がヒンジピン６を介して上下方向に回動
自在に枢支連結された支持アーム７と、この支持アーム
７の前端側に、その前端部が支持軸９を介して上下方向
に回動自在に枢支連結され、原稿圧着板２の後端側に図
外のビス等で取り付けられるリフトアーム１１などから
構成されている。The document pressure plate opening / closing device 3 is provided with a mounting member 5 mounted on the main body 1 of the device with screws or the like, and the mounting member 5.
In addition, a rear end of the support arm 7 is pivotally connected via a hinge pin 6 so as to be pivotable in the vertical direction, and a front end of the support arm 7 is rotated in the vertical direction via a support shaft 9. The lift arm 11 is rotatably and pivotally connected and is attached to the rear end side of the original pressure plate 2 with a screw or the like (not shown).
【００１５】取付部材５は、装置本体１にビス等で取り
付けられる金属製の底板５ａと、この底板５ａの左右両
側端から立ち上げた両側板５ｂ，５ｂ、及び底板５ａの
後端から立ち上げた後板５ｃとを有する形に形成されて
いる。一方、支持アーム７は、金属製の上板７ａと、こ
の上板７ａの左右両側端から下方に折曲した両側板７
ｂ，７ｂ、及びこの両側板７ｂ，７ｂからそれぞれ内向
きに上板７ａと平行に折曲したリップ７ｃ，７ｃとを有
する断面リップ付き溝形状に形成されている。支持アー
ム７はこれの両側板７ｂ，７ｂの後端部が取付部材５の
両側板５ｂ，５ｂにヒンジピン６を介して上下方向に回
動自在に枢支連結される。The mounting member 5 is a metal bottom plate 5a which is mounted on the apparatus main body 1 with screws or the like, both side plates 5b and 5b which are erected from the left and right ends of the bottom plate 5a, and the rear end of the bottom plate 5a. And a rear plate 5c. On the other hand, the support arm 7 includes a metal upper plate 7a and both side plates 7 that are bent downward from both left and right ends of the upper plate 7a.
b, 7b, and lip sections 7c, 7c bent inward from the both side plates 7b, 7b in parallel with the upper plate 7a, respectively, are formed in a groove shape with a lip section. The rear ends of both side plates 7b, 7b of the support arm 7 are pivotally connected to the both side plates 5b, 5b of the mounting member 5 via hinge pins 6 so as to be vertically rotatable.
【００１６】図１、図２に示すように、リフトアーム１
１は、原稿圧着板２の後端側に図外のビス等で取り付け
られる金属製の上板１１ａと、この上板１１ａの左右両
端から下方に折曲した両側板１１ｂ，１１ｂ、及び上板
１１ａの前端から下方に折曲した前板１１ｃとを有する
断面溝形状に形成されている。支持アーム７に対しリフ
トアーム１１は、上板１１ａが支持アーム７の上板７ａ
の上側に、両側板１１ｂ，１１ｂが支持アーム７の両側
板７ｂ，７ｂの外側にそれぞれ重なり合わされるととも
に、両側板１１ｂ，１１ｂの前端部を支持アーム７の両
側板７ｂ，７ｂの前端部に支持軸９まわりに上下方向に
回動自在に枢支連結される。As shown in FIGS. 1 and 2, the lift arm 1
Reference numeral 1 denotes a metallic upper plate 11a attached to the rear end side of the original pressure plate 2 with screws (not shown), both side plates 11b and 11b bent downward from the left and right ends of the upper plate 11a, and the upper plate. It is formed in a groove shape in cross section having a front plate 11c bent downward from the front end of 11a. As for the lift arm 11 with respect to the support arm 7, the upper plate 11a is the upper plate 7a of the support arm 7.
The side plates 11b, 11b are overlapped with the outsides of the side plates 7b, 7b of the support arm 7, respectively, and the front ends of the side plates 11b, 11b are set to the front ends of the side plates 7b, 7b of the support arm 7. It is pivotally connected to the support shaft 9 so as to be vertically rotatable.
【００１７】図１〜図３に示すように、支持アーム７の
両側板７ｂ，７ｂ間のリップ７ｃ，７ｃ上には、耐摩耗
性に優れるポリアセタール系樹脂やポリアミド系樹脂等
で有底筒状に成形されたばね受１４とスライダー１５が
前後に配されてそれぞれが前後方向に摺動自在に組み込
まれる。そして、この支持アーム７内のスライダー１５
とばね受１４との間には、支持アーム７をこれに取り付
けた原稿圧着板２の重量による閉じ方向のモーメントに
抗して開き方向に回動付勢すると共に、リフトアーム１
１を支持アーム７の上側に重なり合うように回動付勢す
る圧縮コイルばね１６が介入される。As shown in FIGS. 1 to 3, on the lips 7c, 7c between the side plates 7b, 7b of the support arm 7, a bottomed cylindrical shape made of polyacetal resin or polyamide resin having excellent wear resistance is used. The spring bearing 14 and the slider 15, which are molded in the above, are arranged in the front and rear, and are respectively slidably incorporated in the front and rear direction. Then, the slider 15 in the support arm 7
Between the spring support 14 and the spring support 14, the support arm 7 is urged to rotate in the opening direction against the moment in the closing direction due to the weight of the original pressure plate 2 attached thereto, and the lift arm 1
A compression coil spring 16 that interposes 1 on the upper side of the support arm 7 to rotate is biased.
【００１８】支持アーム７の上板７ａの内面とスライダ
ー１５との間には、図１、図２に示すように、ダンパー
装置２４を設けている。このダンパー装置２４は、支持
アーム７に固定した、下面に前後方向に長い溝２５と凸
条２６とを左右方向に交互に列設してなるダンパーベー
ス２７と、スライダー１５の上面に、前記溝２５及び凸
条２６と摺動自在に嵌合するよう列設した凸条２８及び
溝２９と、ダンパーベース２７の下面とスライダー１５
の上面との摺動面間に介在した稠度の高いグリース３０
により構成される。なお、図３に示すように、ばね受１
４の上面はダンパーベース２７の左右方向中央付近の凸
条２６に対し軽く摺接する程度の形状に形成してある。A damper device 24 is provided between the slider 15 and the inner surface of the upper plate 7a of the support arm 7, as shown in FIGS. This damper device 24 has a damper base 27 fixed to the support arm 7 and having grooves 25 and projections 26 long in the front-rear direction alternately arranged in a row on the lower surface, and a groove formed on the upper surface of the slider 15. 25 and the protrusions 26, the protrusions 28 and the grooves 29 arranged in a row so as to be slidably fitted, the lower surface of the damper base 27, and the slider 15.
Grease 30 with high consistency interposed between the sliding surface with the upper surface of
It is composed of In addition, as shown in FIG.
The upper surface of No. 4 is formed in such a shape that it is in slight sliding contact with the ridge 26 near the center of the damper base 27 in the left-right direction.
【００１９】図１に示すように、スライダー１５とヒン
ジピン６との間には支持アームカム機構１９が設けられ
る。支持アームカム機構１９は、取付部材５の両側板５
ｂ，５ｂ間にヒンジピン６、及び該ヒンジピン６よりも
下方で且つ前方に偏して該ヒンジピン６と平行に配され
た固定ピン１２により固定されたカム１７と、スライダ
ー１５の背面側に一体的に設けたカムフォロア１８とか
らなる。カム１７は、外周縁の下部に固定ピン１２の軸
心に最も近づくよう形成された径小円弧部１７ａと、こ
の小径円弧部１７ａの上端から上方に向かって固定ピン
１２の軸心から徐々に遠ざかるよう形成された緩やかな
曲縁部１７ｂとを有する形に形成されている。かくして
支持アームカム機構１９は、原稿圧着板２の全閉角度付
近においてカムフォロア１８がカム１７の径小円弧部１
７ａに接触してスライダー１５を圧縮コイルばね１６を
圧縮させる方向に押圧して前進移動させ、原稿圧着板２
を次第に大きく開くに伴いカムフォロア１８が緩やかな
曲縁部１７ｂを摺接して行って圧縮コイルばね１６を次
第に長く伸ばす方向にスライダー１５を後退移動させる
ようにしている。As shown in FIG. 1, a support arm cam mechanism 19 is provided between the slider 15 and the hinge pin 6. The support arm cam mechanism 19 includes both side plates 5 of the mounting member 5.
cam 17 fixed between hinge pin 6 between b and 5b, and fixed pin 12 disposed below and parallel to hinge pin 6 below hinge pin 6, and integrally on the rear side of slider 15. And a cam follower 18 provided in the. The cam 17 has a small-diameter circular arc portion 17a formed at the lower portion of the outer peripheral edge so as to come closest to the axial center of the fixing pin 12, and gradually extends upward from the upper end of the small-diameter circular arc portion 17a from the axial center of the fixing pin 12. It is formed in a shape having a gentle curved edge 17b formed so as to move away. Thus, in the support arm cam mechanism 19, the cam follower 18 has the small-diameter circular arc portion 1 of the cam 17 in the vicinity of the fully closed angle of the original pressure plate 2.
7a and presses the slider 15 in the direction of compressing the compression coil spring 16 to move it forward to move the original pressure plate 2
The cam follower 18 slides in contact with the gentle curved edge portion 17b with the opening of the slider 15, and the slider 15 is moved backward in the direction in which the compression coil spring 16 is gradually extended.
【００２０】本発明は、図１に示すように、リフトアー
ム７の前端部に設けられるリフトカム２０の構造に特徴
を有する。リフトカム２０は、ポリアセタール系樹脂や
ポリアミド系樹脂などで突部２０ａを後ろ向きに突出す
る形に成形してあり、リフトアーム１１の前端側の両側
板１１ｂ，１１ｂと前板１１ｃ間に突部２０ａが支持ピ
ン９より下方に位置するようにビス等で固定される。リ
フトカム２０の突部２０ａは、リフトアーム１１の回動
に伴い支持アーム７の前端側の両側板７ｂ，７ｂ間の内
部に前後方向に進退移動できるように両側板７ｂ、７ｂ
間の内法寸法（Ｗ）（図３参照）よりも短い軸方向長さ
を有するピン形状に一体に形成されている。一方、ばね
受１４の背面側には、リフトカム２０の突部２０ａが常
に当接する斜面突部２１が上方へ至るに従い漸次前方へ
大きく突出するように設けられている。The present invention is characterized by the structure of the lift cam 20 provided at the front end of the lift arm 7, as shown in FIG. The lift cam 20 is made of polyacetal resin, polyamide resin, or the like so that the protrusion 20a protrudes rearward, and the protrusion 20a is formed between the front plate 11c and both side plates 11b and 11b on the front end side of the lift arm 11. It is fixed with screws or the like so as to be located below the support pin 9. The protrusion 20a of the lift cam 20 is moved forward and backward in the front-rear direction into the space between the front and rear side plates 7b and 7b of the support arm 7 as the lift arm 11 rotates.
It is integrally formed in a pin shape having an axial length shorter than the inner dimension (W) of the space (see FIG. 3). On the other hand, on the rear surface side of the spring receiver 14, a sloped projection 21 to which the projection 20a of the lift cam 20 is constantly abutted is provided so as to gradually and largely project forward as it goes upward.
【００２１】上記構成の原稿圧着板の開閉装置によれ
ば、図１のように原稿圧着板２が水平姿勢に全閉した状
態では、圧縮コイルばね１６は支持アームカム機構１９
により押されたスライダー１５を介して最も圧縮された
状態にあって、原稿圧着板２の自重によって生じる閉じ
方向のモーメントの大きさと、圧縮コイルばね１６の弾
力による開方向のモーメントの大きさとが均衡を保って
原稿圧着板２の全閉状態を保持している。According to the document pressure plate opening / closing device having the above-described structure, when the document pressure plate 2 is fully closed in the horizontal position as shown in FIG.
In the most compressed state via the slider 15 pushed by, the magnitude of the closing moment generated by the original weight of the original pressure plate 2 and the magnitude of the opening moment caused by the elasticity of the compression coil spring 16 are balanced. The original pressure plate 2 is kept fully closed.
【００２２】この全閉状態から原稿圧着板２を開くとき
には、支持アーム７を原稿圧着板２の重量による閉じ方
向のモーメントに抗して開き方向へ回動付勢している圧
縮コイルばね１６の弾力によってスライダー１５が支持
アームカム機構１９を介して後退移動しながら原稿圧着
板２が次第に大きく開いて行く。When the original cover 2 is opened from the fully closed state, the compression coil spring 16 is urged to rotate the support arm 7 in the opening direction against the closing moment due to the weight of the original cover 2. Due to the elasticity, the slider 15 moves backward via the support arm cam mechanism 19, and the original pressure plate 2 gradually opens greatly.
【００２３】原稿圧着板２及び支持アーム７が、図４に
示すごとく全開（例えば、６０°）したときは、スライ
ダー１５は最も後退した位置にある。この全開状態から
原稿圧着板２を閉じるときは、スライダー１５は支持ア
ームカム機構１９を介して前進移動し、このスライダー
１５の上面の凸条２８及び溝２９をダンパーベース２７
の下面の溝２５及び凸条２６に対しグリース３０を介し
て摺動することによりダンパー機能を発揮する。このダ
ンパー作用により原稿圧着板２の重量による閉じ方向の
モーメントによる急激な落下を防止でき、原稿圧着板２
が重い場合も落下速度を落としてゆっくり閉じて行くこ
とになる。したがって、その原稿圧着板２とコンタクト
ガラス２３との間で手を挟むなどの事故を予防できる。
かかるダンパー作用は原稿圧着板２の全開状態から全閉
状態になるまでの閉じ過程全域にわたって発揮されるた
め、原稿圧着板２がいかなる開き角度位置からも急激に
落下することがなくなり、安全性が高いものとなる。When the original pressure plate 2 and the support arm 7 are fully opened (for example, 60 °) as shown in FIG. 4, the slider 15 is at the most retracted position. When closing the original cover 2 from this fully opened state, the slider 15 moves forward through the support arm cam mechanism 19, and the protrusions 28 and the grooves 29 on the upper surface of the slider 15 are fitted to the damper base 27.
The damper function is exhibited by sliding through the grease 30 to the groove 25 and the ridge 26 on the lower surface of the. Due to this damper action, it is possible to prevent a sudden drop due to a moment in the closing direction due to the weight of the original cover 2 and the original cover 2
Even if it is heavy, it will slow down and slow down. Therefore, it is possible to prevent an accident such as pinching a hand between the original pressure plate 2 and the contact glass 23.
Since such a damper action is exerted throughout the closing process of the original pressure plate 2 from the fully open state to the fully closed state, the original pressure plate 2 does not drop suddenly from any opening angle position, and safety is improved. It will be expensive.
【００２４】いま、原稿が紙のように薄い薄物原稿を圧
着する場合には、原稿圧着板２は、リフトアーム１１と
取付部材５の間に介在した圧縮コイルばね２４の弾力に
よって開閉動作の全行程にわたって反転することなく操
作され、支持アームカム機構１９を介して支持アーム７
に作用している圧縮コイルばね１６の弾力によって所定
の開き角度で安定よく停止保持される。When a thin original such as paper is pressed against the original, the original pressing plate 2 is fully opened and closed by the elastic force of the compression coil spring 24 interposed between the lift arm 11 and the mounting member 5. It is operated without reversing throughout the stroke, and the support arm 7 is operated via the support arm cam mechanism 19.
Due to the elastic force of the compression coil spring 16 acting on, the motor is stably stopped and held at a predetermined opening angle.
【００２５】図５に示すように、原稿Ｐが本のように厚
物原稿の場合には、厚物原稿Ｐを装置本体１のコンタク
トガラス２３の上に載せ、原稿圧着板２を閉じてその一
部を厚物原稿Ｐに当てがい、原稿圧着板２の手前側を若
干強く下方へ押す。すると、リフトアーム１１が支持軸
９まわりにＭ矢視方向に反転するとともに、リフトカム
２０の突部２０ａがばね受１４の斜面突部２１上を上方
に滑りながら支持アーム７の前端側の両側板７ｂ，７ｂ
間の内部に次第に深く進入して行ってばね受１４を強く
押圧し、圧縮コイルばね１６が圧縮される。つまり、リ
フトアーム１１が圧縮コイルばね１６の弾力に抗して支
持軸９まわりに反転する。このリフトアーム１１の反転
により原稿圧着板２がその後端側をリフトアップされて
厚物原稿Ｐの上部に対して平行となり、厚物原稿Ｐ全体
をコンタクトガラス２３上に均等な圧力で圧着させる。As shown in FIG. 5, when the original P is a thick original such as a book, the thick original P is placed on the contact glass 23 of the apparatus main body 1, and the original press plate 2 is closed. A part of the original is pressed against the thick original P, and the front side of the original press plate 2 is slightly strongly pushed downward. Then, the lift arm 11 flips around the support shaft 9 in the direction of the arrow M, and the projection 20 a of the lift cam 20 slides upward on the slope projection 21 of the spring bearing 14 while the both side plates on the front end side of the support arm 7 are slid upward. 7b, 7b
The compression coil spring 16 is compressed by gradually intruding deeply into the space and strongly pressing the spring bridge 14. That is, the lift arm 11 reverses around the support shaft 9 against the elasticity of the compression coil spring 16. Due to the reversal of the lift arm 11, the original pressing plate 2 is lifted up at its rear end side and becomes parallel to the upper portion of the thick original P, and the entire thick original P is pressed against the contact glass 23 with a uniform pressure.
【００２６】ばね受１４を押圧するリフトカム２０の突
部２０ａは、リフトアーム１１の反転時に支持軸９の下
方から支持アーム７の前端側の両側板７ｂ，７ｂ間の内
部に深く進入して行くようにしてある。したがって、こ
のリフトカム２０はリフトアーム１１の前端側の両側板
１１ｂ，１１ｂ間に設けることで足り、図６、図７に示
す従来のように作動軸４７をリフトアーム４６の両側板
４６ａ，４６ａ間にわたって架設するという面倒な組み
付け手間を要したり、支持アーム４３の両側板４３ａ、
４３ａに作動軸４７との干渉を避けるべく切欠４９を加
工したりすることが無くなり、それだけ支持アーム７を
これの強度を確保し得ながら容易に加工することがで
き、またリフトアーム１１の加工の容易化にも貢献でき
る。The protrusion 20a of the lift cam 20 that presses the spring receiver 14 deeply penetrates from below the support shaft 9 into the space between the two side plates 7b and 7b on the front end side of the support arm 7 when the lift arm 11 is reversed. Is done. Therefore, it suffices that the lift cam 20 is provided between the both side plates 11b, 11b on the front end side of the lift arm 11, and the operating shaft 47 is provided between the both side plates 46a, 46a of the lift arm 46 as in the conventional case shown in FIGS. And the both side plates 43a of the support arm 43,
There is no need to form a notch 49 in 43a in order to avoid interference with the operating shaft 47, so that the support arm 7 can be easily machined while ensuring its strength, and the lift arm 11 can be machined easily. It can also contribute to simplification.
【００２７】リフトカム２０はリフトアーム１１と一体
に形成するもよいが、好ましくは上記実施形態のように
別体に構成すれば、突部２０ａの突出高さや位置が異な
る数種のリフトカム２０を用意し、そのいずれかを選択
して共用のリフトアーム１１に取り付けることによりリ
フトアーム１１の高さが厚物原稿の厚さに対応すべく任
意高さに設定された各種の原稿圧着板開閉装置を容易に
得ることができる。The lift cam 20 may be formed integrally with the lift arm 11. However, if the lift cam 20 is formed separately as in the above embodiment, several types of lift cams 20 having different protrusion heights and positions of the protrusions 20a are prepared. Then, by selecting one of them and attaching it to the common lift arm 11, various document pressure plate opening / closing devices in which the height of the lift arm 11 is set to an arbitrary height to correspond to the thickness of a thick document. Can be easily obtained.
【００２８】[0028]
【発明の効果】以上のように、本発明によれば、支持ア
ームの加工の容易化及び強度確保を図れ、またリフトア
ームの加工、組立ての容易化をも図れるという利点があ
る。As described above, according to the present invention, there is an advantage that the support arm can be easily machined and its strength can be secured, and the lift arm can be easily machined and assembled.
【図１】本発明の一実施例の原稿圧着板開閉装置を全閉
状態で示す縦断側面図である。FIG. 1 is a vertical sectional side view showing a document pressure plate opening / closing device according to an embodiment of the present invention in a fully closed state.
【図２】図１におけるＡ―Ａ断面図である。FIG. 2 is a sectional view taken along line AA in FIG.
【図３】図１におけるＢ―Ｂ線断面図である。FIG. 3 is a sectional view taken along line BB in FIG.
【図４】図１の原稿圧着板開閉装置を全開状態で示す縦
断側面図である。FIG. 4 is a vertical cross-sectional side view showing the original cover pressing device of FIG. 1 in a fully opened state.
【図５】図１の原稿圧着板開閉装置を厚物原稿圧着状態
で示す縦断側面図である。5 is a vertical sectional side view showing the document pressure plate opening / closing device of FIG. 1 in a thick document pressure bonding state.
【図６】従来例の原稿圧着板開閉装置を全閉状態で示す
縦断側面図である。FIG. 6 is a vertical sectional side view showing a document pressing plate opening / closing device of a conventional example in a fully closed state.
【図７】図６の原稿圧着板開閉装置を全開状態で示す縦
断側面図である。FIG. 7 is a vertical cross-sectional side view showing the document pressure plate opening / closing device of FIG. 6 in a fully opened state.
１ 装置本体 ２ 原稿圧着板 ５ 取付部材 ６ ヒンジピン ７ 支持アーム ７ｂ，７ｂ 両側板 ９ 支持軸 １１ リフトアーム １４ ばね受 １６ 圧縮コイルばね ２０ リフトカム ２０ａ 突部 1 device body 2 Original press plate 5 mounting members 6 Hinge pin 7 Support arm 7b, 7b Both side plates 9 Support shaft 11 lift arm 14 Spring receiver 16 Compression coil spring 20 lift cam 20a protrusion
───────────────────────────────────────────────────── フロントページの続き (72)発明者 門屋 厚志 大阪府東大阪市水走３丁目３番40号 下西 技研工業株式会社内 Ｆターム(参考） 2H012 CB12 CB28 2H076 BA08 5C062 AA02 AA05 AB29 AD02 BA00 5C072 AA01 BA02 BA13 LA08 XA01 XA04 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Atsushi Kadoya 3-3-40, Mizusashi, Higashi-Osaka City, Osaka Prefecture Shimonishi Giken Industry Co., Ltd. F-term (reference) 2H012 CB12 CB28 2H076 BA08 5C062 AA02 AA05 AB29 AD02 BA00 5C072 AA01 BA02 BA13 LA08 XA01 XA04
Claims (2)
と、この取付部材に、その両側板の後端部がヒンジピン
を介して上下方向に回動自在に枢支連結された支持アー
ムと、この支持アームの上側に重なり合い該支持アーム
の前端部に、その両側板の前端部が支持軸を介して上下
方向に回動自在に枢支連結されて、原稿圧着板の後端側
に取り付けられるリフトアームと、前記支持アームと前
記取付部材との間に、前記支持アームを開き方向へ回動
付勢し、かつ前記リフトアームを前記支持アームと重な
り合う方向へ付勢するように装着された圧縮コイルばね
と、前記支持アームに、前記圧縮コイルばねの前端部を
受けて前後方向に摺動自在に組み込まれたばね受と、を
備えている原稿圧着板の開閉装置において、 前記リフトアームの前端側の両側板間に、リフトアーム
の支持軸回りの反転時に前記支持軸の下方から前記支持
アームの前端側の両側板間の内部に進入して前記ばね受
を押圧する突部を有するリフトカムが設けられているこ
とを特徴とする、原稿圧着板の開閉装置。1. A mounting member to be mounted on the apparatus main body side, a supporting arm to which rear ends of both side plates of the mounting member are pivotally connected in a vertically rotatable manner via hinge pins, and the supporting member. A lift arm that overlaps the upper side of the arm and has front end portions of both side plates pivotally connected to the front end portion of the support arm in a vertically rotatable manner via a support shaft, and is attached to the rear end side of the original pressure plate. And a compression coil spring mounted between the support arm and the mounting member so as to urge the support arm to rotate in the opening direction and to urge the lift arm in a direction overlapping with the support arm. An opening / closing device for the original pressing plate, the supporting arm including a spring receiver that receives the front end of the compression coil spring and is slidably mounted in the front-rear direction. A lift cam is provided between the plates, the lift cam having a protrusion that enters the space between both side plates on the front end side of the support arm from below the support shaft when the lift arm is inverted about the support shaft and presses the spring receiver. A device for opening and closing the original pressure plate.
体に構成されて該リフトアームの前端側の両側板間に取
り付けられている、請求項１記載の原稿圧着板の開閉装
置。2. The document pressing plate opening / closing device according to claim 1, wherein the lift cam is formed separately from the lift arm and is attached between both side plates on the front end side of the lift arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002100925A JP2003295358A (en) | 2002-04-03 | 2002-04-03 | Opening and closing apparatus for original press-contact plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002100925A JP2003295358A (en) | 2002-04-03 | 2002-04-03 | Opening and closing apparatus for original press-contact plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003295358A true JP2003295358A (en) | 2003-10-15 |
Family
ID=29241568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002100925A Pending JP2003295358A (en) | 2002-04-03 | 2002-04-03 | Opening and closing apparatus for original press-contact plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003295358A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101020611B1 (en) * | 2007-08-21 | 2011-03-09 | 가토오덴키가부시키가이샤 | apparatus for opening or closing plate pressing manuscript and office equipment with the same |
| JP2011107485A (en) * | 2009-11-18 | 2011-06-02 | Katoh Electrical Machinery Co Ltd | Device for opening/closing original cover plate and business machine |
| JP2013186277A (en) * | 2012-03-07 | 2013-09-19 | Shimonishi Giken Kogyo Kk | Damper |
| JP2016024266A (en) * | 2014-07-17 | 2016-02-08 | セイコーエプソン株式会社 | Image reading apparatus |
| JP2020071317A (en) * | 2018-10-30 | 2020-05-07 | 下西技研工業株式会社 | Hinge |
-
2002
- 2002-04-03 JP JP2002100925A patent/JP2003295358A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101020611B1 (en) * | 2007-08-21 | 2011-03-09 | 가토오덴키가부시키가이샤 | apparatus for opening or closing plate pressing manuscript and office equipment with the same |
| JP2011107485A (en) * | 2009-11-18 | 2011-06-02 | Katoh Electrical Machinery Co Ltd | Device for opening/closing original cover plate and business machine |
| JP2013186277A (en) * | 2012-03-07 | 2013-09-19 | Shimonishi Giken Kogyo Kk | Damper |
| JP2016024266A (en) * | 2014-07-17 | 2016-02-08 | セイコーエプソン株式会社 | Image reading apparatus |
| JP2020071317A (en) * | 2018-10-30 | 2020-05-07 | 下西技研工業株式会社 | Hinge |
| JP7283725B2 (en) | 2018-10-30 | 2023-05-30 | 下西技研工業株式会社 | hinge |
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